bataya tau tha.....
chal neways...
its C
because pie chart mein 1st of all 3 sects hote hein>>oxygen...nitrogen aur other gases..
nitrogen has the greatest %>>78%
so (78/100)*360=280.8
oxygen cums nxt>>21%
(21/100)*360=75.6
aur baki ki other gases hoti hein....
so ven u match up the results ull end up with C